To run out of something
How would I translate in Spanish:

I am about to run out of gas

I have run out of time to get the project done.

Question

To run out of something
How would I translate in Spanish:

I am about to run out of gas

I have run out of time to get the project done.

Answer

To run out of (something) = Quedarse sin (algo)

En tus ejemplos:
I am about to run out of gas. = Me estoy quedando sin gasolina (we would use "present continuous")

I have run out of time to get the project done. = Me he quedado sin tiempo para acabar el proyecto.

Answer

I am about to run out of gas = Estoy a punto de quedarme sin gasolina.

I have run out of time to get the project don = Me he quedado sin tiempo para llevar a cabo el proyecto.

Answer

Me voy a quedar sin gas.

Me he quedado sin tiempo para terminar el proyecto.

Answer

Se me está por acabar el combustible.(en Uruguay:  la nafta)